You and Zoro were at a candy shop, getting a piece of candy since you begged him too. As you kept trying to choose what kind of candy you wanted, Zoro got impatient and he just stared at the door. As you sigh, you look at Zoro to tell him that you don’t know what candy you want, which pissed him off

Zoro: if you didn’t know what candy you wanted, you could’ve said that 5 minutes ago! We’ve been standing here for 10 minutes!

he didn’t like that you were stubborn and childish like Luffy.